Turquoise and Gahnite Physical Properties

Turquoise

Gahnite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.904.00-4.62

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Conchoidal, Uneven

1.6 Cleavage

Good to perfect_usually N/A

Indistinct parting on [111]

1.7 Mohs Hardness

5-67.5-8

2 10

1.8 Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Turquoise and Gahnite Chemical Formula

While comparing Turquoise and Gahnite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Turquoise and Gahnite chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Turquoise and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.